Precision calculations in BR(anti-B --> Xs gamma)

TL;DR

This paper reviews the latest perturbative and non-perturbative calculations at NNLO accuracy for the ar{B} o X_s \gamma decay rate, highlighting recent progress and remaining challenges.

Contribution

It provides a concise summary of the current status of NNLO perturbative and non-perturbative calculations in ar{B} o X_s \gamma decay.

Findings

Recent NNLO calculations improve theoretical precision

Non-perturbative corrections are being systematically analyzed

Progress helps refine Standard Model predictions for rare decays

Abstract

We briefly summarize the current status of perturbative calculations at next-to-next-to-leading-order (NNLO) accuracy in the \bar{B}\to X_s\gamma decay rate as well as that of non-perturbative power-corrections.